Closed Loop Water Cooling
What They Are
These are bolt-on kits that take about 20 minutes to install. They have virtually no maintenance, are sealed "closed-loop" from the manufacturer, and are designed to be essentially plug-and-play.
Pros and Cons of Closed Loop Water Cooling
They are not expandable, but provide a relatively easy and inexpensive start to liquid cooling.
These kits are typically meant for CPU cooling only, and are not able to expand to other components.
Sometimes a GPU is compatible with an adapter bracket, GPU verification would be necessary to determine bracket compatibility.
These solutions tend to be universally applicable. These systems range from $40 to $200+, plus labor cost. Labor is billed at $100/hr, with a 1hr minimum charge.